This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
In Go, strings are immutable just as they are in Java and Python. This has many benefits both in terms of performance and for writing robust concurrent programs.
var s string = "Some text"
var t string = "Some text"
would mean at runtime s == t in Java (afaik)
This is an implementation detail that may or may not be true for any given JVM. The same applies in Python. In Go, s == t is true (== sensibly does the string comparison), but &s != &t (i.e., each has a different address so each string is unique). However, the address uniqueness is still just an implementation detail and shouldn't be assumed.